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2014-09-30Improve handler interface and documentationLoïc Hoguin
This change simplifies a little more the sub protocols mechanism. Aliases have been removed. The renaming of loop handlers as long polling handlers has been reverted. Plain HTTP handlers now simply do their work in the init/2 callback. There is no specific code for them. Loop handlers now follow the same return value as Websocket, they use ok to continue and shutdown to stop. Terminate reasons for all handler types have been documented. The terminate callback is now appropriately called in all cases (or should be). Behaviors for all handler types have been moved in the module that implement them. This means that cowboy_handler replaces the cowboy_http_handler behavior, and similarly cowboy_loop replaces cowboy_loop_handler, cowboy_websocket replaces cowboy_websocket_handler. Finally cowboy_rest now has the start of a behavior in it and will have the full list of optional callbacks defined once Erlang 18.0 gets released. The guide has been reorganized and should be easier to follow.
2014-09-26Unify the init and terminate callbacksLoïc Hoguin
This set of changes is the first step to simplify the writing of handlers, by removing some extraneous callbacks and making others optional. init/3 is now init/2, its first argument being removed. rest_init/2 and rest_terminate/2 have been removed. websocket_init/3 and websocket_terminate/3 have been removed. terminate/3 is now optional. It is called regardless of the type of handler, including rest and websocket. The return value of init/2 changed. It now returns {Mod, Req, Opts} with Mod being either one of the four handler type or a custom module. It can also return extra timeout and hibernate options. The signature for sub protocols has changed, they now receive these extra timeout and hibernate options. Loop handlers are now implemented in cowboy_long_polling, and will be renamed throughout the project in a future commit.
2014-09-23Breaking update of the cowboy_req interfaceLoïc Hoguin
Simplify the interface for most cowboy_req functions. They all return a single value except the four body reading functions. The reply functions now only return a Req value. Access functions do not return a Req anymore. Functions that used to cache results do not have a cache anymore. The interface for accessing query string and cookies has therefore been changed. There are now three query string functions: qs/1 provides access to the raw query string value; parse_qs/1 returns the query string as a list of key/values; match_qs/2 returns a map containing the values requested in the second argument, after applying constraints and default value. Similarly, there are two cookie functions: parse_cookies/1 and match_cookies/2. More match functions will be added in future commits. None of the functions return an error tuple anymore. It either works or crashes. Cowboy will attempt to provide an appropriate status code in the response of crashed handlers. As a result, the content decode function has its return value changed to a simple binary, and the body reading functions only return on success.
2013-09-09Fix the list of registered processes in the examplesLoïc Hoguin
2013-09-08Convert the POST echo example to a releaseLoïc Hoguin
2013-09-07Fix wrong header sent in echo_post exampleLoïc Hoguin
2013-09-04Make cowlib a proper dependencyLoïc Hoguin
Start moving a few functions from Cowboy into cowlib.
2013-01-29Make examples use the new routingLoïc Hoguin
2013-01-22Replace terminate/2 with terminate/3, adding a ReasonLoïc Hoguin
This should have been done a *long* time ago, back when I initially added Websocket support. This is the first part of two in improving loop handler support with regards to socket closure. Reason may include: {normal, shutdown} for the most normal shutdown, {normal, timeout} for a loop handler timeout shutdown, or {error, _} if an error occured.
2013-01-19Make cowboy_req:has_body/1 return boolean()Loïc Hoguin
This makes it similar to the other has_* functions.
2013-01-05Fix examples to follow new env tuple standardUnix1
This brings examples in line with the recent Middleware change.
2012-12-05Make a few more missing headers lowercaseLoïc Hoguin
2012-10-11Start crypto also in the examples and documentationLoïc Hoguin
2012-09-21Don't use decode_packet/3 for parsing the request-lineLoïc Hoguin
First step in making all methods and header names binaries to get rid of many inconsistencies caused by decode_packet/3. Methods are all binary now. Note that since they are case sensitive, the usual methods become <<"GET">>, <<"POST">> and so on.
2012-09-17Improve consistency of return types for cowboy_req APILoïc Hoguin
The signature of parse_header, body_qs, multipart_data and the set_resp_* functions has changed. See the cowboy_req module edoc for more details.
2012-08-27Rename cowboy_http_req to cowboy_reqLoïc Hoguin
2012-08-27Switch to Ranch for connection handlingLoïc Hoguin
This is the first of many API incompatible changes. You have been warned.
2012-07-22Add a POST echo exampleLoïc Hoguin